US 12,104,457 B2
Failsafe safety valve with linear electromechanical actuation
Bruce Edward Scott, McKinney, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Oct. 12, 2022, as Appl. No. 17/964,789.
Claims priority of provisional application 63/336,673, filed on Apr. 29, 2022.
Prior Publication US 2023/0349262 A1, Nov. 2, 2023
Int. Cl. E21B 34/06 (2006.01)
CPC E21B 34/066 (2013.01) [E21B 2200/03 (2020.05); E21B 2200/04 (2020.05); E21B 2200/05 (2020.05); E21B 2200/06 (2020.05)] 16 Claims
OG exemplary drawing
 
1. A linear electromechanical actuator for use in a well, comprising:
an electrically powered motor for driving a rotation;
at least one resolver located next to the electrically powered motor to provide positional feedback to the electrically powered motor to ensure the electrically powered motor is rotating in the intended direction;
a drive section for converting the rotation of the motor to a linear movement of an actuating member for actuating a valve;
a clutch for coupling the motor with the drive section, wherein the clutch is configured to selectively decouple the motor from the drive section in response to a well shut-in event;
at least one single stage gearbox located between the drive section and the clutch;
at least one multi-stage gearbox located between the electrically powered motor and the clutch;
a brake located next to the at least one resolver and one or more redundant electrical features comprising two or more coils each operable to perform a function of the corresponding electrical feature in the event of a failure of that electrical feature.